This looks pretty interesting. I see That the top panel is hinged on, Are the levers connected to any type of switch?
The two circuit boards that hang down look like they have terminal blocks?
If this is correct, did you buzz out the switches to the terminal blocks?
If you have 12 switches on your layout you could control from here. Just make a new drawing of your layout and insert it under the plexiglass. Looks like fun.
RonH